Componentize safe_browsing: move renderer/ reporting part for WebView.

components/safe_browsing/renderer/BUILD.gn

+# Copyright 2017 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import("//build/config/features.gni")
+
+source_set("renderer") {
+  if (safe_browsing_mode != 0) {
+    sources = [
+      "threat_dom_details.cc",
+      "threat_dom_details.h",
+    ]
+    deps = [
+      "//base",
+      "//components/safe_browsing/common:common",
+      "//content/public/renderer",
+      "//ipc",
+      "//third_party/WebKit/public:blink",
+      "//url/ipc:url_ipc",
+    ]
+    if (is_win) {
+      cflags = [ "/wd4267" ]  # conversion from 'size_t' to 'int' on x64 (crbug.com/702773)
+    }
+  }
+}